Device for Modifying the Position of the Segments in the Event of the Inclination of a Segmented Grinding Pad

ABSTRACT

When a segmented grinding pad ( 11, 12, 13 ) of a continuous belt grinding machine is inclined, the modified position of the row ( 15 ) of key elements in relation to the original, for example, right-angled position of the row ( 11 ) of segments presents a problem. The aim of the invention is to carry out an approximate comparison of the deviations created by the lateral displacement of the segments S 1  . . . S n  by means of a lever device ( 16 ) or a servomotor. The full compensation of the deviations of the segments from the longitudinal axis thereof to the key elements can be achieved by a special embodiment of one such device.

TECHNICAL FIELD AND BACKGROUND OF THE INVENTION

This invention makes reference to sanding belt engineering. It describes the adjusting of the position of the segments to match the oblique alignment of a segmented sanding pad.

The oblique alignment of a segmented sanding pad is described in the patent application under the international file nos./international application dates PCT/CH02/00415 of 22/7/2002 and PCT/CH04/000509 of 16/8/2004.

SUMMARY OF THE INVENTION

In oblique alignment of the segmented sanding pad (11, 12, 13) a through feed belt-sanding machine has the problem of a varying position of the contact roller series (15) compared to the original, for example perpendicular, segment series (11) position. The invention demonstrates a close rebalancing of the occurring deviation due to the lateral shift of segments S₁ . . . S_(n), by means of a lever device (16) or positioning motor. A complete compensation for the deviation of the segments from their longitudinal axis to the contact rollers can be achieved through a custom design of such a device.

BRIEF DESCRIPTION OF THE DRAWINGS

To illustrate the invention serve:

(a) Drawing 1 showing the starting position, with the arrangement of a segmented sanding pad with individually controllable segments (11), the sanding belt deflection rollers (12 and 13), the contact rollers (15) positioned ahead of the pad in the feed direction (14), and a lever device (16) for the sanding elements (11), which effects the lateral shift of these segments when the contact rollers are rotated, in accordance with Patent claim 1.

(b) Drawing 2 with the same arrangement and device as Drawing 1, but with the segmented sanding pad (11, 12, 13) rotated obliquely through angle α.

(c) Drawing 3 with an arrangement as in Drawing 1, but with a fixed stop (17), with segments (11) fitted with slides (18), guide axis (20), a counter-pressure device (19), showing the longitudinal axis (21).

(d) Drawing 4 with the same arrangement and device as Drawing 3, but with the segmented sanding pad (11, 12, 13) rotated obliquely through angle α.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT AND BEST MODE

The current state of technology knows the advantages of the oblique alignment of a belt-sanding unit and the combination of an obliquely alignable belt-sanding unit with a segmented sanding pad, as described in the above-quoted patent submissions.

From Patent Application PCT/CH2004/000509 a device is known which, with the oblique alignment of a segmented sanding pad, via a lever device or a positioning motor, brings the contact rollers T₁ . . . T_(n) back into agreement with segments S₁ . . . S_(n). This invention describes a lever device, or other device serving the same purpose, such as a positioning motor, which wile leaving the contact rollers (15) in their original position, moves segments S₁ . . . S_(n) laterally in such a way that they remain roughly aligned with the contact rollers.

The device described here has the advantage over that described in Patent Application PCT/CH2004/000509 in that the fixed contact roller series can serve a number of sequential segmented sanding pads with any straight/oblique alignment, while a laterally shifted contact roller series can only align with a single specific oblique alignment angle of the sanding pad(s).

In addition, this invention addresses the problem that in an arrangement as per Drawings 1 and 2, the greater the angle α of the oblique alignment, the more the segments (11) leave the perpendicular with respect the contact rollers (15). To compensate these differences, in place of a lever device (16) an arrangement is preferred with a fixed stop (17), guiding segments (11, 18), a guide axis (20) and a counter pressure device (19), as shown in Drawings 3 and 4. In place of the mechanical arrangement, naturally, other devices for the same purposes may be employed, such as motorized electronic or pneumatic type systems. 

1. Device with a segmented sanding pad, which when moved obliquely its segments are aligned in accordance with the degree of oblique movement, characterized in that the longitudinal axes of the individual contact rollers and the corresponding segments are aligned with respect to each other, when the gap between the segments is adjusted to the longitudinal axis of the contact rollers.
 2. Device with a segmented sanding pad, which when moved to an oblique position, the segments in the longitudinal axis are positioned to align with their corresponding contact roller, characterized in that the longitudinal axis of the individual contact rollers and the corresponding segments are aligned with respect to each other, when the gap between the segments is adjusted to the longitudinal axis of the contact rollers. 